Mozilla will start a more aggressive campaign to convince users of the older Firefox 3.6 to upgrade to the newest edition, Firefox 7.

The move would be the first time that Mozilla has offered what it calls an "advertised update" or a "major update" to people still running 2010's Firefox 3.6. Earlier this week, Mozilla said it would kick off the offer today.

According to Mozilla, the offer does not hint at an impending retirement of the older version.

"The advertised update has no bearing on support levels [emphasis in original]," said Firefox release manager Christian Legnitto in a blog post Wednesday. "It does not mean Firefox 3.6 is end-of-life."

The offer that users see starting today will ask them to upgrade to the newest edition, Firefox 7.0.1. If they decline, they can continue to run Firefox 3.6 and will keep receiving the security updates Mozilla has releases every six weeks.

The upgrade is postponed for the time-being:Planet Firefox: Postponing the Firefox 3.6.x → 7.0 advertised updateThe previously scheduled 3.6 → 7.0.1 advertised update is now postponed while we make sure our server capacity is sufficient for release. Once the investigation is complete I will communicate a new date well in advance so all stakeholders can plan accordingly.